CN104582870A

CN104582870A - Method for producing curved article and skeleton structure member for automobile body shell

Info

Publication number: CN104582870A
Application number: CN201380043555.8A
Authority: CN
Inventors: 麻生敏光; 田中康治; 宫城隆司; 小川操; 河野一之
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 2012-09-12
Filing date: 2013-09-05
Publication date: 2015-04-29
Anticipated expiration: 2033-09-05
Also published as: CA2882244A1; TWI542421B; BR112015004713A2; EP2896467A4; CN104582870B; RU2610191C2; TW201420230A; EP2896467B1; IN2015DN01290A; RU2015106689A; US20150224563A1; ES2823726T3; MY181405A; JPWO2014042067A1; JP5733475B2; EP2896467A1; WO2014042067A1; US10179360B2; KR101682839B1; KR20150038417A

Abstract

The present invention produces a curved article (10) having a hat-shaped cross section by means of press molding without generating cracks or wrinkles. When producing by means of press molding a curved article (10) having a roughly hat-shaped cross section comprising a top plate (11), vertical walls (12a, 12b) extending in parallel to each other along the ridge line (14a, 14b) of the top plate, and outward-facing flanges (13a, 13b) joined to the tips of the vertical walls, a starting material metal plate (601) is sandwiched and bound by a die (502) and a blank holder (505) and press molded while the starting material metal plate (601) is sandwiched and bound by a pad (503) and a punch (504).

Description

The skeleton structure component of the bending manufacture method of parts and the bodyshell of automobile

Technical field

The present invention relates to compressing to metal blank and manufacture has the method for bending parts in hat-shaped cross section and the skeleton structure component of the bodyshell of automobile.

Background technology

There is hat-shaped cross section and the compressing parts with the profile bent to length direction are used as the skeleton structure component of the bodyshell of such automobile such as such as longeron (front longitudinal, floor side member).These compressing parts are important spare parts of the collision performance for guaranteeing automobile, and, in order to the lightweight of the improvement and car body that promote crashworthiness, require this compressing parts high strength.In the past, the shaping method to suppress to metal blank carries out drawing and forming was adopted to manufacture this compressing parts.

Figure 18 A represents to have hat-shaped section flexure parts (below, referred to as " bending parts ") stereogram of the example of 10, Figure 18 B is the top view of bending parts 10, Figure 18 C is the side view of bending parts 10, Figure 18 D is the front view of the bending parts 10 observed from an end side, further, Figure 18 E is the stereogram of convex curvature portion 11a for illustration of bending parts 10 and convex curve portion 11b.In addition, Figure 19 A schematically represents the sectional view utilizing conventional art manufacture to bend the drawing processing machine of parts 10, Figure 19 B represents to clamp between die 202 and holding pad 203 and punch 204 and to retrain the sectional view in the stage of metal blank 201, Figure 19 C is the sectional view representing the state be pressed into by punch 204 from the stage shown in Figure 19 B, and Figure 19 D represents from the stage shown in Figure 19 C to be pressed into by punch 204 further thus punch 204 is pressed completely into the sectional view of the state of die 202.In addition, Figure 20 A is the stereogram representing metal blank 201, and Figure 20 B is conventional art according to Figure 19 A ~ Figure 19 D and the stereogram of the drawing plate 301 manufactured.

Such as, when shown in shop drawings 18A ~ Figure 18 E bending parts 10, first as shown in Figure 19 A, the metal blank 201 shown in Figure 20 A is configured between die 202 and holding pad 203 and punch 204.Next, as shown in Figure 19 B, the surrounding utilizing die 202 and holding pad 203 to clip metal blank 201 pressurizes.Next, as shown in Figure 19 C, Figure 19 D, utilize punch 204 that the central portion of metal blank 201 is given prominence to and be desired shape by metal blank 201 drawing and forming.In the process of this drawing and forming, as shown in fig. 19 c, due to the surrounding of metal blank 201 by die 202 and holding pad 203 by press against, therefore the inside of metal blank 201 is applied in tension force and utilizes punch 204 and be shaped.Metal blank 201, while utilize die 202 and holding pad 203 to retrain to a certain extent around it, is configured as the drawing plate 301 with the shape shown in Figure 20 B by flowing in die 202.By cut away the surrounding of this drawing plate 301 do not need part and shop drawings 18A ~ Figure 18 E shown in bending parts 10.

Figure 21 be represent the drawing plate 301 shown in Figure 20 B is easy to crack, the stereogram at the position of fold.

When utilization is carried out the shaping method to suppress of drawing and forming and manufactures bending parts 10, as shown in figure 21, in the stage being configured as drawing plate 301, be easy at the top board 301a of the convex curve portion 311b of drawing the plate 301 and flange 301b of convex curvature portion 311a produce the fold caused due to excess material.In general, in order to suppress fold to produce, metal blank 201 is suppressed excessively to flow in die 202 by the plus-pressure that increases holding pad 203 or the constraint that increases at holding pad 203 around metal blank 201 that the methods such as draw bead strengthen in forming process comparatively effective.

But, utilize the words that these methods suppression metal blank 201 flows in die 202, too reduce at top board 301c, the flange 301d of convex curve portion 311b of the convex curvature portion 311a of drawing plate 301,301e place, the end thickness of slab of length direction, when metal blank 201 is the lower material of ductility, in these regions, 301c, 301d, 301e crack.

Therefore, do not crack and the fold ground bending parts 10 that to manufacture with such as longeron be representative to utilize the shaping method to suppress carrying out drawing and forming, be difficult to the lower high-strength material (such as high-tensile steel) of use ductility as metal blank 201, have to adopt the low-intensity material that ductility is higher.Therefore, in order to ensure the intensity required by bending parts 10, the thickness of slab of increase metal blank 201 of having to, thus hamper the lightweight of the skeleton structure component of bodyshell.

And when utilizing the shaping method to suppress manufacture carrying out drawing and forming to bend parts 10, owing to cutting away not needing part and being discarded of the periphery that is present in drawing plate 301, therefore the utilization rate of material also reduces.

In addition, in patent document 1 ~ 4, propose to have to have as hat-shaped cross section, zigzag cross section etc. simply, the technology of the parts bending forming in identical in the longitudinal direction cross section.But, the method for the parts that unexposed manufacture is made up of the shape that image curvature parts 10 are so complicated in patent document 1 ~ 4.

prior art document

patent document

Patent document 1: Japanese Unexamined Patent Publication 2003-103306 publication

Patent document 2: Japanese Unexamined Patent Publication 2004-154859 publication

Patent document 3: Japanese Unexamined Patent Publication 2006-015404 publication

Patent document 4: Japanese Unexamined Patent Publication 2008-307557 publication

Summary of the invention

the problem that invention will solve

The present invention completes in view of these problems existing for technology in the past, its object is to provide a kind of method, the method utilizes compressing, not at the top board in convex curve portion, the flange in convex curvature portion produces fold, not at the top board in convex curvature portion, the flange even end of length direction in convex curve portion cracks ground, and stock utilization manufactures longeron (the such as front longitudinal of the skeleton structure component of the bodyshell be suitable for as such as automobile preferably, floor side member), there is hat-shaped cross section and there are the bending parts of the profile bent to length direction, and a kind of skeleton structure component utilizing the such as longeron manufactured by the method such.

And, the low-intensity material that the object of the invention is to not only use ductility higher is as metal blank, also the lower high-strength material (such as, hot strength is at the high-tensile steel of more than 440MPa) of ductility is used to manufacture above-mentioned skeleton structure component as metal blank.

for the scheme of dealing with problems

The present invention lifts as listed below.

(1) a kind of manufacture method of bending parts, this manufacture method uses the compression molding device of punch and the holding pad comprising die and scraping wings and relatively configure with this die and scraping wings, by metal blank is pressed under cold state or tepid state, manufacture bending parts, these bending parts comprise main body, this main body is by the top board of lengthwise, two longitudinal walls, and two export-oriented flanges are formed, these two longitudinal walls are connected with the both ends of this top board and extend towards the direction roughly orthogonal with this top board, two export-oriented flanges are connected with these two longitudinal walls respectively, this main body has the shape of cross section of hat-shaped, and, this main body has the part place top board of the length direction at described top board, two longitudinal walls and two export-oriented flanges are all the profile of bowing towards the short transverse of longitudinal wall, it is characterized in that,

While keep utilizing scraping wings to press on punch the part being used for being configured as top board being configured at die and scraping wings and the metal blank between punch and holding pad and pressurizeing and clamp this part, and, utilize holding pad to press on die the part being used for being configured as longitudinal wall and export-oriented flange of metal blank and pressurize and clamp the state of this part, while make holding pad and die be that boundary moves towards the side being configured with punch and holding pad relative to scraping wings and punch with metal blank, thus the bending parts with hat-shaped cross section are formed.

In the present invention, the atmosphere being meant to room temperature of " cold ", being meant to of " warm " is higher than cold temperature, but temperature is lower than Ac ₃point, preferably Ac ₁the atmosphere that point is following.

(2) manufacture method of the bending parts according to technical scheme 1, wherein, scraping wings is connected to the scraping wings pressue device with constant stroke, holding pad is connected to holding pad pressue device, and, after bending parts have been shaped, use scraping wings pressue device and holding pad pressue device, by holding pad not to be fixed relative to the mode of punch relative movement, and after bending parts are not pressed on die by this holding pad, die is separated with punch from holding pad with scraping wings, and the taking-up of parts slef-suppression shaped device will be bent.

(3) manufacture method of the bending parts according to technical scheme 1, wherein, scraping wings is connected to scraping wings pressue device, and holding pad is connected to the holding pad pressue device with constant stroke, and, after bending parts have been shaped,

Use scraping wings pressue device and holding pad pressue device, by scraping wings not to be fixed relative to the mode of die relative movement, and after bending parts are not pressed on punch by this scraping wings, die is separated with punch from holding pad with scraping wings, and the taking-up of parts slef-suppression shaped device will be bent.

(4) according to the manufacture method of the bending parts in technical scheme 1 to 3 described in any one, wherein, die has the inner surface configuration of the shape of longitudinal wall and the flange outer surface separately comprising bending parts, scraping wings has the external surface shape of the shape of the outer surface of the top board comprising bending parts, punch has the external surface shape of the shape of top board and the longitudinal wall inner surface separately comprising bending parts, further, holding pad has the external surface shape of the shape of the inner surface of the flange comprising bending parts.

(5) according to the manufacture method of the bending parts in technical scheme 1 to 4 described in any one, wherein, interior angle formed by the top board of shape of cross section and longitudinal wall is 90 ° ~ 92 °.

(6) according to the manufacture method of the bending parts in technical scheme 1 to 5 described in any one, wherein, when bending parts have been shaped, the gap between the part that longitudinal wall is formed of die and the part that longitudinal wall is formed of punch has been 100% ~ 120% of the thickness of slab of metal blank.

(7) according to the manufacture method of the bending parts in technical scheme 1 to 6 described in any one, wherein, metal blank is that thickness of slab is 0.8mm ~ 3.2mm and hot strength is the steel plate of 200MPa ~ 1600MPa.

(8) according to the manufacture method of the bending parts in technical scheme 1 to 7 described in any one, wherein, scraping wings is utilized the part being used for being configured as top board of metal blank to be pressurizeed to punch pressing to this part with the press pressure of more than 0.1MPa, further, holding pad is utilized the part being used for being configured as longitudinal wall and export-oriented flange of metal blank to be pressurizeed to die pressing to this part with the press pressure of more than 0.1MPa.

(9) according to the manufacture method of the bending parts in technical scheme 1 to 8 described in any one, wherein, metal blank is preprocessing metallic plate metal blank having been carried out to preprocessing.

(10) according to the manufacture method of the bending parts in technical scheme 2 to 9 described in any one, wherein, aft-loaded airfoil is carried out to the bending parts that slef-suppression shaped device takes out.

(11) a kind of skeleton structure component, this skeleton structure component has main body, this main body is by two longitudinal walls, two export-oriented flanges, and the top board of lengthwise is formed, wherein, two longitudinal walls are connected with the both ends of this top board and extend to the direction roughly orthogonal with this top board, two export-oriented flanges are connected with these two longitudinal walls respectively, this main body has the shape of cross section of hat-shaped, and, this main body has the part place top board of the length direction being included in top board, two longitudinal walls and two export-oriented flanges are all the profile of the bend of bowing towards the short transverse of longitudinal wall, this skeleton framework component forms the bodyshell of automobile, it is characterized in that,

Described main body is more than 440MPa with hot strength and the steel plate that thickness of slab is 1.0mm ~ 2.3mm is raw material, and be the compressing body under cold state or tepid state, the thickness of slab of this bend is less than 15% relative to the reduction rate of the thickness of slab of the part of the remnants except bend.

As the skeleton structure component of the bodyshell in the present invention, illustration has the front longitudinal of formation enging cabin, is engaged in the floor side member of the lower surface of rear floor panel and is engaged in the floor centre gangway etc. of front floor panel in addition.

the effect of invention

Adopt the present invention, while keep utilizing scraping wings and punch to clamp and retrain metal blank for being configured as the part of top board and utilizing holding pad and die to clamp and retrain the state of the part for being configured as longitudinal wall and flange of metal blank, while make holding pad and die relative to scraping wings and punch with metal blank be boundary towards the side relative movement being configured with punch and holding pad, thus to Sheet metal forming, therefore, it is possible to prevent top board and flange from producing fold, further, can utilize and form based on the plastic deformation of the detrusion of longitudinal wall.Therefore, owing to not needing to apply larger tension force to metal blank in formation, therefore, it is possible to the clout reduced as the portion that gives up of metal blank thus improve stock utilization, thus can solve the problem.

Accompanying drawing explanation

Fig. 1 is that reduced representation is in a disassembled state implemented manufacture method of the present invention and manufactures the stereogram of the compression molding device of bending parts.

Fig. 2 A is the simplified cross-sectional view of situation when representing that the processing of the compression molding device shown in Fig. 1 starts.

Fig. 2 B represents at the die of the compression molding device shown in Fig. 1 and scraping wings and clamps between holding pad and punch and retrain the simplified cross-sectional view of the situation of metal blank.

Fig. 2 C is the simplified cross-sectional view representing situation about being pressed into by punch from the stage shown in Fig. 2 B.

Fig. 2 D represents that punch is pressed completely into the simplified cross-sectional view of the situation of die when being pressed into by punch further from the stage shown in Fig. 2 C.

Fig. 3 is that reduced representation is in a disassembled state implemented manufacture method of the present invention and manufactures the stereogram of another compression molding device of bending parts.

Fig. 4 A is the simplified cross-sectional view of situation when representing that the processing of the compression molding device shown in Fig. 3 starts.

Fig. 4 B represents at the die of the compression molding device shown in Fig. 3 and scraping wings and clamps between holding pad and punch and retrain the simplified cross-sectional view of the situation of metal blank.

Fig. 4 C is the simplified cross-sectional view representing situation about being pressed into by punch from the stage shown in Fig. 4 B.

Fig. 4 D represents make punch be pressed into the simplified cross-sectional view of the situation of die completely punch press-in further from the stage shown in Fig. 4 C.

Fig. 5 A is the key diagram representing principle of the present invention.

Fig. 5 B is the key diagram representing the shearing fold produced when implementing of the present invention.

Fig. 5 C is the side view representing the shearing fold produced when implementing of the present invention.

Fig. 6 A is by representing formed interior angle θ between longitudinal wall and top board, gap between die and the longitudinal wall part of punch, representing the key diagram preventing the condition shearing fold.

Fig. 6 B is by representing formed interior angle θ between longitudinal wall and top board, gap between die and the longitudinal wall part of punch, representing the key diagram preventing the condition shearing fold.

Fig. 7 A be represent punch is pressed into completely die and by Sheet metal forming for bending parts after, the key diagram of issuable problem when bending parts are taken out from mould.

Fig. 7 B is the key diagram representing stage punch being exited from the state shown in Fig. 7 A relative to die.

Fig. 7 C is the key diagram representing stage punch being exited completely from the state shown in Fig. 7 B relative to die.

Fig. 8 A represents for solving by the key diagram of the method for the problem shown in Fig. 7 A ~ Fig. 7 C.

Fig. 8 B is the key diagram representing stage punch being exited from the state shown in Fig. 8 A relative to die.

Fig. 8 C is the key diagram representing stage punch being exited completely from the state shown in Fig. 8 B relative to die.

Fig. 9 A represents for solving by the key diagram of the other method of the problem shown in Fig. 7 A ~ Fig. 7 C.

Fig. 9 B is the key diagram representing stage punch being exited from the state shown in Fig. 9 A relative to die.

Fig. 9 C is the key diagram representing stage punch being exited completely from the state shown in Fig. 9 B relative to die.

Figure 10 A is the stereogram with the embodiment of the bending parts in hat-shaped cross section representing employing the present invention and manufacture.

Figure 10 B is the top view from the bending parts shown in top view Figure 10 A.

Figure 10 C is the side view of the bending parts shown in Figure 10 A.

Figure 10 D is the A-A sectional view of Figure 10 C.

Figure 11 is the key diagram of the gap b representing table 1.

Figure 12 A is the stereogram with another embodiment of the bending parts in hat-shaped cross section representing employing the present invention and manufacture.

Figure 12 B is the top view from the bending parts shown in top view Figure 12 A.

Figure 12 C is the side view of the bending parts shown in Figure 12 A.

Figure 12 D is the front view observing the bending parts shown in Figure 12 A from an end side.

Figure 13 A is the stereogram with another embodiment of the bending parts in hat-shaped cross section representing employing the present invention and manufacture.

Figure 13 B is the top view from the bending parts shown in top view Figure 13 A.

Figure 13 C is the side view of the bending parts shown in Figure 13 A.

Figure 13 D is the front view observing the bending parts shown in Figure 13 A from an end side.

Figure 14 A is the stereogram with the another embodiment of the bending parts in hat-shaped cross section representing employing the present invention and manufacture.

Figure 14 B is the top view from the bending parts shown in top view Figure 14 A.

Figure 14 C is the side view of the bending parts shown in Figure 14 A.

Figure 14 D is the front view observing the bending parts shown in Figure 14 A from an end side.

The another embodiment with the bending parts in hat-shaped cross section that Figure 15 A is application the present invention and manufactures, extends in a part for total length the stereogram being provided with the bending parts of export-oriented flange.

Figure 15 B is the top view from the bending parts shown in top view Figure 15 A.

Figure 15 C is the side view of the bending parts shown in Figure 15 A.

Figure 15 D is the front view observing the bending parts shown in Figure 15 A from an end side.

The another embodiment with the bending parts in hat-shaped cross section that Figure 16 A is application the present invention and manufactures, the stereogram of the bending parts that top board is widened to the other end from an end.

Figure 16 B is the top view from the bending parts shown in top view Figure 16 A.

Figure 16 C is the side view of the bending parts shown in Figure 16 A.

Figure 16 D is the front view observing the bending parts shown in Figure 16 A from an end side.

Figure 17 A is the key diagram using pre-manufactured blanks manufacture to bend the method for the present invention of parts, is the stereogram of the metal blank used in the method.

Figure 17 B is the stereogram of the state representing the metal blank shown in preprocessing Figure 17 A.

Figure 17 C is the stereogram of the bending parts be shaped from the metal blank shown in Figure 17 B through preprocessing.

Figure 17 D is the stereogram of the bending parts represented under the state after further bending parts shown in finishing Figure 17 C.

Figure 18 A is the stereogram of the example representing the bending parts with hat-shaped cross section.

Figure 18 B is the top view of bending parts.

Figure 18 C is the side view of bending parts.

Figure 18 D is the front view observing bending parts from an end side.

Figure 18 E is the stereogram in convex curvature portion for illustration of bending parts and convex curve portion.

Figure 19 A schematically represents the sectional view utilizing conventional art manufacture to bend the drawing processing machine of parts.

Figure 19 B represents to clamp between die and holding pad and between die and punch and to retrain the sectional view in the stage of metal blank.

Figure 19 C is the sectional view representing the state be pressed into further by punch from the stage shown in Figure 19 B.

Figure 19 D represents that punch is pressed into the sectional view of the state of die completely when being pressed into further by punch further from the stage shown in Figure 19 C.

Figure 20 A is the stereogram representing metal blank.

Figure 20 B represents the stereogram utilizing the drawing plate manufactured by conventional art shown in Figure 19 A ~ Figure 19 D.

Figure 21 be represent to be easy to crack on the drawing plate shown in Figure 20 B, the stereogram at the position of fold.

description of reference numerals

10, bending parts; 11, top board; 12a, longitudinal wall; 12b, longitudinal wall; 13a, flange; 13b, flange; 14a, crest line; 14b, crest line; 15a, concave; 15b, concave; 502, die; 503, scraping wings; 504, punch; 505, holding pad; 506, scraping wings pressue device; 507, holding pad pressue device.

Detailed description of the invention

With reference to accompanying drawing, the present invention is described.

Utilize the present invention can the bending parts 10 shown in shop drawings 18A ~ Figure 18 E.

As shown in Figure 18 A ~ Figure 18 E, bending parts 10 are by top board 11, longitudinal wall 12a, 12b, and export-oriented flange 13a, 13b are formed, wherein, longitudinal wall 12a, 12b are connected with the two side ends of top board 11 respectively, and export-oriented flange 13a, 13b are connected with the end of the side contrary with the side that top board 11 is connected of longitudinal wall 12a, 12b, and extend to the direction contrary with top board 11, these bending parts 10 have the cross sectional shape of hat-shaped.

Crest line 14a, 14b is formed at top board 11 and between longitudinal wall 12a, 12b.And, longitudinal wall 12a, 12b and export-orientedly between flange 13a, 13b, be formed with concave 15a, 15b.Crest line 14a, 14b and concave 15a, 15b are configured to almost parallel.Have at a part of place of the length direction of top board 11: convex curvature portion 11a, its outside to the cross sectional shape of hat-shaped (the outer surface side of top board 11) is in bowing; And convex curve portion 11b, its inner side to the cross sectional shape of hat-shaped (inner surface side of top board 11) is in bowing.

The crest line 14a that top board 11 and longitudinal wall 12a are formed is bowing at the position 16a corresponding to convex curvature portion 11a, the 17a place, position corresponding to convex curve portion 11b, further, the crest line 14b that formed of top board 11 and longitudinal wall 12b also correspond to convex curvature portion 11a position 16b, be bowing corresponding to the position 17b of convex curve portion 11b.That is, as shown in figure 18 c, bending parts 10 side-looking is observed in S word shape, and in other words, longitudinal wall 12a, 12b formed by the dull and stereotyped of S font.

" arcuation " is not limited to a part for complete circular arc herein, also can be a part for such as ellipse, hyperbola, sine curve and other curves.

So, bending parts 10 have main body 10a.Main body 10a is made up of top board 11, two longitudinal walls 12a, 12b of lengthwise and two export-oriented flange 13a, 13b, wherein, two longitudinal walls 12a, 12b are connected with the both ends of top board 11 and extend to the direction roughly orthogonal with top board 11, two export-oriented flange 13a, 13b are connected with two longitudinal walls 12a, 12b respectively, and this main body 10a has the cross sectional shape of hat-shaped.And main body 10a has top board 11, two longitudinal walls 12a, 12b and two export-oriented flange 13a, 13b, and this is all the profile of bowing towards the short transverse of longitudinal wall 12a, 12b at a part of place of the length direction of top board 11.

Fig. 1 is that reduced representation is in a disassembled state implemented manufacture method of the present invention and manufactures the stereogram of the compression molding device 501 of bending parts 10.

As shown in Figure 1, compression molding device 501 has die 502, scraping wings 503, punch 504, holding pad 505.

Die 502 has the inner surface configuration of the external surface shape of longitudinal wall 12a, the 12b comprising bending parts 10 and the external surface shape of flange 13a, 13b.Scraping wings 503 has the external surface shape of the external surface shape of the top board 11 comprising bending parts 10.Punch 504 is configured to relative with scraping wings 503 with die 502, and, there is the external surface shape of the inner surface configuration of the top board 11 comprising bending parts 10 and the inner surface configuration of longitudinal wall 12a, 12b.And holding pad 505 has the external surface shape of the inner surface configuration of flange 13a, 13b of comprising bending parts 10.

Fig. 2 A is the simplified cross-sectional view of situation when representing that the processing of compression molding device 501 starts, Fig. 2 B represents at the die 502 of compression molding device 501 and scraping wings 503 and clamps between holding pad 505 and punch 504 and retrain the simplified cross-sectional view of the situation of metal blank 601, Fig. 2 C is the simplified cross-sectional view representing situation about being pressed into by punch 504 from the stage shown in Fig. 2 B, and, Fig. 2 D represents that punch 504 is pressed completely into the simplified cross-sectional view of the situation of die 502 when being pressed into further by punch 504 from the stage shown in Fig. 2 C.

As shown in Fig. 2 A ~ Fig. 2 D, scraping wings 503 connects and is supported on the such scraping wings pressue device 506 of air cushion, hydraulic means, spring or Vidacare corp, and can pressurize to metal blank 601 and be pressed on the top of punch 504.

In addition, holding pad 505 connects and is supported on the such holding pad pressue device 507 of air cushion, hydraulic means, spring or Vidacare corp, and can pressurize to metal blank 601 and be pressed on die 502.

First, as shown in Figure 2 A, metal blank 601 is configured at die 502 and scraping wings 503 and between punch 504 and holding pad 505.

Next, as shown in Figure 2 B, metal blank 601 is pressurized and clamped between scraping wings 503 and punch 504 by being pressed on punch 504 by scraping wings 503 for the part being configured as top board 11.And, metal blank 601 pressed on die 502 for the part be formed separately as longitudinal wall 12a, 12b and export-oriented flange 13a, 13b by holding pad 505, and pressurized and clamped between holding pad 505 and die 502.

Utilize the scraping wings 503 pressurizeed by scraping wings pressue device 506, the part being used for being configured as top board 11 of metal blank 601 is pressed on punch 504, metal blank 601 is pressurized and be held between scraping wings 503 and punch 504, thus, metal blank 601 is retained as the state cannot be out of shape outside face.And, utilize, by the holding pad 505 that holding pad pressue device 507 pressurizes, the part being used for being configured as longitudinal wall and export-oriented flange of metal blank 601 is pressed on die 502, metal blank 601 is pressurized and be held between holding pad 505 and die 502, thus, metal blank 601 is retained as the state cannot be out of shape outside face.

In this condition, make holding pad 505 and die 502 be that boundary moves to the side being configured with punch 504 and holding pad 505 relative to scraping wings 503 and punch 504 with metal blank 601, metal blank 601 is formed.

As shown in Figure 2 C, along with punch 504 and holding pad 505 move, the metal blank 601 be held between punch 504 and holding pad 505 flow into the inner side of die 502 and forms longitudinal wall 12a, 12b gradually.

And as shown in Figure 2 D, move predetermined distance at punch 504 and holding pad 505 and can guarantee the stage of the height of longitudinal wall 12a, 12b of needing, shaping completes.

Herein, in the example shown in Fig. 2 A ~ Fig. 2 D, in the process be shaped, by punch 504, metal blank 601 is pressed on punch 504 thus also under irremovable state, be pressed into by die 502, holding pad 505 also moves together with die 502 by fixing and scraping wings 503.But the present invention is not limited to this form.

Fig. 3 is that reduced representation is in a disassembled state implemented manufacture method of the present invention and manufactures the stereogram of another compression molding device 501-1 of bending parts 10.And, Fig. 4 A is the simplified cross-sectional view of situation when representing that the processing of the compression molding device 501-1 shown in Fig. 3 starts, Fig. 4 B represents at the die 602 of compression molding device 501-1 and scraping wings 603 and clamps between holding pad 605 and punch 604 and retrain the simplified cross-sectional view of the situation of metal blank 601, Fig. 4 C is the simplified cross-sectional view representing situation about being pressed into by punch 604 from the stage shown in Fig. 4 B, and, Fig. 4 D represents when being pressed into further by punch 604 from the stage shown in Fig. 4 C, punch 604 is pressed completely into the simplified cross-sectional view of the situation of die 602.

Different from the example shown in Fig. 1 and Fig. 2 A ~ Fig. 2 D, as shown in Fig. 3 and Fig. 4 A ~ Fig. 4 D, metal blank 601 also pressed on die 602 and under irremovable state at die 602 is fixing and holding pad 605, when punch 604 is pressed into, scraping wings 603 is moved together with punch 604, thus, holding pad 605 and die 602 also can be made to be that boundary moves towards the side being configured with punch 604 and holding pad 605 relative to scraping wings 603 and punch 604 with metal blank 601.That is, for the relative motion of mould, the example shown in the example shown in Fig. 3 with Fig. 4 A ~ Fig. 4 D with Fig. 1 with Fig. 2 A ~ Fig. 2 D is identical, metal blank 601 can be configured as bending parts 10 equally.

During forming longitudinal wall 12a, 12b gradually, metal blank 601 for being configured as the part of top board 11 owing to being pressurizeed by scraping wings 503 and punch 504 and clamping, if therefore plus-pressure is enough, then do not produce outside face at metal blank 601 and be out of shape, and can prevent metal blank 601 from producing fold completely.In addition, metal blank 601 for being configured as the part of flange 13a, 13b also owing to being pressurizeed by holding pad 505 and die 502 and clamping, if therefore plus-pressure is enough, does not then produce outside face at metal blank 601 and be out of shape, and fold can be prevented completely.

When above-mentioned plus-pressure is insufficient, cannot prevents from being out of shape outside the face of metal blank 601, and produce fold.When metal blank 601 be the skeleton structure component of the bodyshell being often used as such automobile such as such as longeron (front longitudinal, floor side member), thickness of slab is 0.8mm ~ 3.2mm, hot strength is the steel plate of 200MPa ~ 1600MPa, above-mentioned plus-pressure is preferably more than 0.1MPa.

Fig. 5 A is the key diagram representing principle of the present invention, the stereogram of the shearing fold produced when Fig. 5 B is and represents and implement of the present invention, and Fig. 5 C is the side view of issuable shearing fold when representing that enforcement is of the present invention.

In the present invention, for the part for being configured as longitudinal wall 12a, 12b of metal blank 601, being pressurizeed for the part being configured as top board 11 by scraping wings 503 and punch 504 and clamping.In addition, the part for being configured as flange 13a, 13b is also pressurizeed by holding pad 505 and die 502 and clamps.And, for be configured as top board 11 part, for being configured as the part of longitudinal wall 12a, 12b and the part for being configured as export-oriented flange 13a, 13b is all formed in the mode being bowing to the short transverse of longitudinal wall 12a, 12b.Therefore, as shown in Figure 5A, for being configured as the Partial Shear distortion of longitudinal wall 12a, 12b.Therefore, according to the present invention, the detrusion for the part being configured as longitudinal wall 12a, 12b can be utilized to make metal blank 601 be configured as bending parts 10 for the plastic deformation of main body.Due to detrusion be before being deformed after the very little distortion of the change of the very little thus thickness of slab of area change, so the thickness of slab of longitudinal wall 12a, 12b of bending parts 10 reduces suppressed.

In addition, due in this shaping for the part that is configured as top board 11 and export-oriented flange 13a, 13b by out-of-plane bending, but not by larger stretcher strain, compression, therefore the thickness of slab of top board 11 and export-oriented flange 13a, 13b part reduces also suppressed, its result, overall as bending parts 10, thickness of slab reduces suppressed.

In addition, the part being configured as longitudinal wall 12a, 12b of metal blank 601 owing to carrying out detrusion, therefore during formation longitudinal wall 12a, 12b, in the minimum principal strain directions compression of detrusion.Therefore, if the gap of the longitudinal wall part of die 502 and punch 504 is excessive, then as shown in figs. 5 b and 5 c, produce and shear fold 18.In order to suppress the generation of this shearing fold 18, using during making longitudinal wall 12a, 12b be shaped as the gap between die 502 and punch 504 and be that the gap of the part for making longitudinal wall 12a, 12b be shaped is set as less, the thickness of slab approaching to metal blank 601 is comparatively effective.

Fig. 6 A is interior angle θ formed by longitudinal wall 12a, 12b by representing bending parts 10 and top board 11 and as the gap b for the part that makes longitudinal wall 12a, 12b be shaped in the gap between die 502 and punch 504, represent the key diagram preventing the condition shearing fold 18, Fig. 6 B is interior angle θ formed by longitudinal wall 12a, 12b by representing bending parts 10 and top board 11 and as the gap b for the part that makes longitudinal wall 12a, 12b be shaped in the gap between die 502 and punch 504, represents the key diagram preventing the condition shearing fold.

As shown in Fig. 6 A, Fig. 6 B, in order to not form the negative angle of mould when being shaped, formed by longitudinal wall 12a, 12b and top board 11, interior angle θ needs to be more than 90 °.But be then the shaped gap at initial stage of interior angle θ large words more excessive in 90 ° becomes large.Therefore, interior angle θ be more than 90 ° and as far as possible close to below the angle of 90 ° advantageously.So that such as longeron (front longitudinal will be generally used for, floor side member) etc. the skeleton structure component of bodyshell of such automobile, thickness of slab is 0.8mm ~ 3.2mm, hot strength is that the steel plate of 200MPa ~ 1600MPa uses as metal blank 601 and to longitudinal wall 12a, the height of 12b is the situation that the bending parts 10 of below 200mm form is the words of example, when interior angle θ is more than 92 °, as shown in Figure 6B, sometimes at longitudinal wall 12a, 12b produces fold, therefore top board 11 and longitudinal wall 12a, between 12b, formed interior angle θ is preferably 90 ° ~ 92 °, at longitudinal wall 12a, the moment that 12b has been shaped, in gap between die 502 and punch 504 to longitudinal wall 12a, the gap b of the part that 12b forms is preferably 100% ~ 120% of the thickness of slab of metal blank 601.

Fig. 7 A be represent and metal blank 601 be configured as bending parts 10 when punch 504 being pressed into completely die 502 after, the key diagram of the problem produced when bending parts 10 are taken out from mould, Fig. 7 B is the key diagram representing stage punch 504 being exited from the state shown in Fig. 7 A relative to die 502, further, Fig. 7 C is the key diagram representing stage punch 504 being exited completely from the state shown in Fig. 7 B relative to die 502.

As shown in Fig. 7 A ~ Fig. 7 C, after metal blank 601 is configured as bending parts 10, take out from mould in order to parts 10 will be bent, die 502 is separated from punch 504 and between mould, vacates the words in gap, scraping wings 503 and holding pad 505 are pressurizeed by scraping wings pressue device 506 and holding pad pressue device 507 respectively, therefore bending parts 10 are subject to the rightabout plus-pressure respectively from scraping wings 503 and holding pad 505, deform and damaged by pressure, the bending parts 10 of predetermined shape cannot be obtained.

Fig. 8 A is the key diagram of the method represented for solving the problem shown in Fig. 7 A ~ Fig. 7 C, Fig. 8 B is the key diagram representing stage punch 504 being exited from the state shown in Fig. 8 A relative to die 502, further, Fig. 8 C is the key diagram representing stage punch 504 being exited completely from the state shown in Fig. 8 B relative to die 502.

As shown in Fig. 8 A ~ Fig. 8 C, after metal blank 601 is configured as bending parts 10, holding pad 505 is fixed not move relative to punch 504, under the state that the bending parts 10 be shaped do not press to die 502 by holding pad 505, by the words that die 502 is separated from holding pad 505 with scraping wings pressue device 506, until scraping wings pressue device 506 extends to end of travel, scraping wings 503 all pressurizes to bending parts 10 always, but, scraping wings pressue device 506 move regulation above distance and scraping wings pressue device 506 extends to the limit and after the end of travel that arrives scraping wings 503 leave from punch 504, bending parts 10 are not subject to the pressurization from scraping wings 503 and holding pad 505 simultaneously, die 502 and scraping wings 503 and can be separated between holding pad 505 and punch 504, and bending parts 10 can be taken out from mould.

Fig. 9 A is the key diagram of the other method represented for solving the problem shown in Fig. 7 A ~ Fig. 7 C, Fig. 9 B is the key diagram representing stage punch being exited from the state shown in Fig. 9 A relative to die, further, Fig. 9 C is the key diagram representing stage punch being exited completely from the state shown in Fig. 9 B relative to die.

As shown in Fig. 9 A ~ Fig. 9 C, after metal blank 601 is configured as bending parts 10, scraping wings 503 is fixed as and does not move relative to die 502, under the state that the bending parts 10 be shaped do not press to punch 504 by scraping wings 503, scraping wings 503 and die 502 are from holding pad 505 is separated with punch 504 when, until holding pad pressue device 507 extends to end of travel, holding pad 505 all pressurizes to bending parts 10 always, but die 502 move regulation above distance and holding pad pressue device 507 extends to the limit and after the end of travel that arrives holding pad 505 leave from die 502, bending parts 10 are not subject to the pressurization from scraping wings 503 and holding pad 505 simultaneously, die 502 and scraping wings 503 can be separated with between holding pad 505 and punch 504, and bending parts 10 can be taken out from mould.

Figure 10 A is the stereogram of the embodiment representing the bending parts 100 of application manufactured by the present invention, and Figure 10 B is the top view bending parts 100 from top view, and Figure 10 C is the side view of bending parts 100, and Figure 10 D is the A-A sectional view of Figure 10 C.Further, Figure 11 is the key diagram of the gap b representing table 1 described later.

The Reference numeral 100a of Figure 10 A ~ Figure 10 D represents main body, and Reference numeral 111 represents top board, and Reference numeral 112a, 112b represent longitudinal wall, and Reference numeral 113a, 113b represent export-oriented flange.

In table 1, gather the various examples representing the bending parts 100 shown in shop drawings 10A ~ Figure 10 D.In table 1, angle θ is formed interior angle θ between longitudinal wall 112a, 112b as shown in Figure 10 D and top board 111, as shown in figure 11, gap b is the gap between scraping wings 503 and punch 504, between die 502 and punch 504, between die 502 and holding pad 505.

[table 1]

Example 1 ~ the example 19 of table 1 is all the present invention's example, " the generation fold " of table 1 represents the fold producing the degree be allowed to, (1) example 1 ~ example 5 changes longitudinal wall 112a, the example of the angle θ of 112b, (2) example 6 ~ example 9 is the space change thickness of slab t relative to mould, more detail is the example changing thickness of slab t relative to constant gap b, (3) example 10 ~ example 13 changes the example putting on the pressure (scraping wings pressure) of scraping wings 503, (4) example 14 ~ example 16 changes the example putting on the pressure (holding pad pressure) of holding pad 505, (5) example 17 ~ example 19 is the examples of the hot strength changing material.Check and whether bending parts 100 manufactured in each example have fold to produce.

Figure 12 A is the stereogram of another embodiment 110 representing the bending parts of application manufactured by the present invention, Figure 12 B is the top view bending parts 110 from top view, Figure 12 C is the side view of bending parts 110, further, Figure 12 D is the front view observing the bending parts shown in Figure 12 A from an end side.

As shown in Figure 12 A ~ Figure 12 D, bending parts 110 comprise: top board 112; Longitudinal wall 114,116, its crest line 112a, 112b along top board 112 are extended in parallel to each other; And export-oriented flange 118a, 118b, it is connected with the top of longitudinal wall 114,116 respectively, and these bending parts 110 have roughly hat-shaped cross section.

And top board 112 forms the curved surface bending in roughly S shape not being positioned at a plane.Export-oriented flange 118a, 118b are extended and are set to almost parallel relative to top board 112, in the same manner as top board 112, form the curved surface bending in roughly S shape not being positioned at a plane.And longitudinal wall 114,116 also forms the curved surface bending in roughly S shape not being positioned at a plane.

Figure 13 A is the stereogram of the another embodiment 120 representing the bending parts of application manufactured by the present invention, Figure 13 B is the top view bending parts 120 from top view, Figure 13 C is the side view of bending parts 120, further, Figure 13 D is the front view observing bending parts 120 from an end side.

As shown in Figure 13 A ~ Figure 13 D, bending parts 120 comprise: top board 122; Longitudinal wall 124,126, its crest line 122a, 122b along top board 122 are extended in parallel to each other; And export-oriented flange 128a, 128b, it is connected with the top of longitudinal wall 124,126 respectively, and as shown in fig. 13 c, these bending parts 120 observe the shape with lateral bend upward in side, the shape that is bloated towards outside.Top board 122 forms the curved surface of the lateral bend not outwardly being positioned at a plane, and export-oriented flange 128a, 128b are extended is almost parallel relative to top board 122.Longitudinal wall 124,126 is formed by the flat board paralleled with the paper of Figure 13 C.

Figure 14 A is the stereogram of the another embodiment 130 representing the bending parts of application manufactured by the present invention, Figure 14 B is the top view bending parts 130 from top view, Figure 14 C is the side view of bending parts 130, further, Figure 14 D is the front view observing bending parts 130 from an end side.

As shown in Figure 14 A ~ Figure 14 D, bending parts 130 observe the shape with lateral bend down, the shape that is inwards caved in from the side contrary with the bending parts 120 shown in Figure 13 A ~ Figure 13 D.Bending parts 130 comprise: top board 132; Longitudinal wall 134,136, its crest line 132a, 132b along top board 132 are extended in parallel to each other; And export-oriented flange 138a, 138b, it is connected with the top of longitudinal wall 134,136 respectively, and as shown in Figure 14 C, these bending parts 130 observe the shape with decurvation from side, the shape that is inwards caved in.Top board 132 forms the inwards bending curved surface not being positioned at a plane.Export-oriented flange 138a, 138b are extended substantially in parallel relative to top board 132.Longitudinal wall 134,136 is formed by the flat board paralleled with the paper of Figure 14 C.

Figure 15 A represents the another embodiment 140 of the bending parts of application manufactured by the present invention and the stereogram for being provided with the bending parts 140 of export-oriented flange 148a, 148b in the part extension of total length, Figure 15 B is the top view bending parts 140 from top view, Figure 15 C is the side view of bending parts 140, further, Figure 15 D is the front view observing bending parts 140 from an end side.

As shown in Figure 15 A ~ Figure 15 D, bending parts 140 comprise: top board 142; Longitudinal wall 144,146, its crest line 142a, 142b along top board 142 are extended in parallel to each other; And export-oriented flange 148a, 148b, it is connected with the top of longitudinal wall 144,146 respectively, and these bending parts 140 have roughly hat-shaped cross section.And top board 142 forms roughly bending in the S shape curved surface not being positioned at a plane.Export-oriented flange 148a, 148b are extended and are set to almost parallel relative to top board 142, and in the same manner as top board 142, form roughly bending in the S shape curved surface not being positioned at a plane.And longitudinal wall 144,146 also forms roughly bending in the S shape curved surface not being positioned at a plane.

Bending bending parts 110 shown in parts 140 from Figure 12 A ~ Figure 12 D are different, export-oriented flange 148a, 148b be not extended be arranged at longitudinal wall 144,146 total length on.That is, longitudinal wall 144,146 comprises the part not having export-oriented flange 148a, 148b.In Figure 15 A ~ Figure 15 D, export-oriented flange 148a, 148b have the length shorter than the length of longitudinal wall 144,146 from an end of bending parts 140 along the lower edge portion of longitudinal wall 144,146.Further, export-oriented flange 148a and export-oriented flange 148b can form equal length, but especially as shown in Figure 15 B, Figure 15 D, export-oriented flange 148a and export-oriented flange 148b also can have different length.

Bending parts 140 are suitable as an example and the floor side member of the skeleton structure component of the bodyshell forming automobile.Bending parts 140 comprise main body 140a.

Main body 140a is by the top board 142 of lengthwise, two longitudinal walls 144,146, and two export-oriented flange 148a, 148b are formed, wherein two longitudinal walls 144,146 are connected with the both ends of top board 142 and extend to the direction roughly orthogonal with top board 142, two export-oriented flange 148a, 148b are connected with a respective part for two longitudinal walls 144,146, and this main body 140a has the cross sectional shape of hat-shaped.

And, main body 140a at the part place of the length direction of top board 142 in the profile comprising bend 149a, at this bend 149a place, top board 142, two longitudinal walls 144,146 and two export-oriented flange 148a, 148b are all bowing in the short transverse of longitudinal wall 144,146.

Main body 140a is more than 440MPa with hot strength and the steel plate that thickness of slab is 1.0mm ~ 2.3mm is raw material, and is the compressing body under cold state or tepid state.

The thickness of slab of bend 149a is less than 15% relative to the reduction rate of the thickness of slab of the remainder 149b except bend 149a.

Bent member 140 is manufactured in order to utilize the shaping method to suppress carried out with reference to the drawing and forming in the past illustrated by Figure 18 ~ Figure 21, have to adopt hot strength to be that the low intensive steel plate of below 400MPa is as raw material, and, the thickness of slab of bend 149a is very big relative to the reduction rate of the thickness of slab of the remainder 149b except bend 149a, is about 20% ~ 35%.Therefore, need such as to increase stiffener to strengthen bend 149a in this wise, but the bent member 140 obtained by the present invention can be more than 440MPa with hot strength and the thickness of slab steel plate that is 1.0mm ~ 2.3mm as raw material, and, reduction rate due to above-mentioned thickness of slab is significantly suppressed below 15%, therefore has enough intensity and does not need to strengthen bend 149a.

Figure 16 A represents the another embodiment of bending parts of application manufactured by the present invention and the stereogram of the bending parts 150 widened to the other end from an end for top board 152, Figure 16 B is the top view bending parts 150 from top view, Figure 16 C is the side view of bending parts 150, further, Figure 16 D is the front view observing bending parts 150 from an end side.

As shown in Figure 16 A ~ Figure 16 D, bending parts 150 comprise: top board 152; Longitudinal wall 154,156, its crest line 152a, 152b along top board 152 are extended in parallel to each other; And export-oriented flange 158a, 158b, it is connected with the top of longitudinal wall 154,156, and these bending parts 140 are observed in roughly S font from side.Top board 152 forms roughly bending in the S shape curved surface not being positioned at a plane.Export-oriented flange 158a, 158b by extended substantially in parallel with top board 152, and in the same manner as top board 152, form roughly bending in the S shape curved surface not being positioned at a plane.Each longitudinal wall 154,156 is that roughly S shape is bending in the plane paralleled with the paper of Figure 21 C.In the bending parts 10 of Figure 18 A ~ Figure 18 E, the width of top board 12 is constant in the longitudinal direction, but the top board 152 of the bending parts 150 of Figure 16 A ~ Figure 16 D is widened to the end of opposite side from an end of bending parts 150.

Figure 17 A is the key diagram using pre-manufactured blanks manufacture to bend the method for the present invention of parts 70, it is the stereogram of the metal blank 72 used in the method, Figure 17 B represents stereogram metal blank 72 being carried out to the state of preprocessing, Figure 17 C is by the stereogram of the metal blank be pretreated favorably bending parts formed thereby, and Figure 17 D is the stereogram of the bending parts represented under the state of repairing the bending parts shown in Figure 17 C further.

And, in the present invention, also can carry out preprocessing to metal blank, use the metal blank that this has been pretreated favorably afterwards, be pressed by said method.

Such as, carry out the preprocessing forming multiple seat surfaces 74 as seen in this fig. 17b at the metal blank 72 being cut to predetermined shape as shown in Figure 17 A, afterwards, in this way as shown in Figure 17 C compressing carried out to the metal blank 72 with multiple seat surface 74 thus form compressing body 76.

Now, owing to utilizing scraping wings, top plate portion is pressed on punch, prevent the seat surface 74 of preprocessing to be out of shape, it is therefore preferable that and be provided with at scraping wings and punch the shape that is equivalent to seat surface 74 separately and seat surface 74 shifting ground can not be made to pressurize to metal blank, clamp.And, also can after compressing, carry out repairing the aft-loaded airfoil such as processing and forming the finished goods 70 shown in Figure 17 D further.

Claims

1. the manufacture method of bending parts, this manufacture method uses the compression molding device of punch and the holding pad comprising die and scraping wings and relatively configure with this die and scraping wings, by metal blank is pressed under cold state or tepid state, manufacture bending parts, these bending parts comprise main body, this main body is by the top board of lengthwise, two longitudinal walls, and two export-oriented flanges are formed, wherein two longitudinal walls are connected with the both ends of this top board and extend towards the direction roughly orthogonal with this top board, two export-oriented flanges are connected with these two longitudinal walls respectively, this main body has the shape of cross section of hat-shaped, and, this main body has the described top board in part place of the length direction at described top board, described two longitudinal walls and described two export-oriented flanges are all the profile of bowing towards the short transverse of described longitudinal wall, wherein,

While keep the part being used for being configured as described top board be configured in described die and described scraping wings and the metal blank between described punch and described holding pad being pressed on described punch with described scraping wings and pressurizeing and clamp this part, and the part being configured as described longitudinal wall and described export-oriented flange being used in described metal blank utilizes described holding pad to press on described die and pressurizes and clamp the state of this part, while make described holding pad and described die be configured with the side relative movement of described punch and described holding pad relative to described scraping wings and described punch court, thus described bending parts are formed.

2. the manufacture method of bending parts according to claim 1, wherein,

Described scraping wings is connected to the scraping wings pressue device with constant stroke, and described holding pad is connected to holding pad pressue device, and, after described bending parts have been shaped,

Use described scraping wings pressue device and described holding pad pressue device, by described holding pad not to be fixed relative to the mode of described punch relative movement, and after described bending parts are not pressed on described die by this holding pad, described die is separated with described punch from described holding pad with described scraping wings, and described bending parts are taken out from described compression molding device.

3. the manufacture method of bending parts according to claim 1, wherein,

Described scraping wings is connected to scraping wings pressue device, and described holding pad is connected to the holding pad pressue device with constant stroke, and, after described bending parts have been shaped,

Use described scraping wings pressue device and described holding pad pressue device, by described scraping wings not to be fixed relative to the mode of described die relative movement, and after described bending parts are not pressed on described punch by this scraping wings, described die is separated with described punch from described holding pad with described scraping wings, and described bending parts are taken out from described compression molding device.

4. the manufacture method of bending parts as claimed in any of claims 1 to 3, wherein,

Described die has the inner surface configuration of the shape of described longitudinal wall and the described flange outer surface separately comprising described bending parts, described scraping wings has the external surface shape of the shape of the outer surface of the described top board comprising described bending parts, described punch has the external surface shape of the shape of described top board and the described longitudinal wall inner surface separately comprising described bending parts, further, described holding pad has the external surface shape of the shape of the inner surface of the described flange comprising described bending parts.

5. the manufacture method of bending parts as claimed in any of claims 1 to 4, wherein,

Formed by the described top board of described shape of cross section and described longitudinal wall, interior angle is 90 ° ~ 92 °.

6. the manufacture method of bending parts as claimed in any of claims 1 to 5, wherein,

When described bending parts have been shaped, the gap between the part that described longitudinal wall is shaped of described die and the part that described longitudinal wall is shaped of described punch has been 100% ~ 120% of the thickness of slab of described metal blank.

7. the manufacture method of bending parts as claimed in any of claims 1 to 6, wherein,

Described metal blank is that thickness of slab is 0.8mm ~ 3.2mm and hot strength is the steel plate of 200MPa ~ 1600MPa.

8. the manufacture method of bending parts as claimed in any of claims 1 to 7, wherein,

The part utilizing described scraping wings with the press pressure of more than 0.1MPa to be configured as described top board being used in metal blank is pressurizeed to described punch pressing to this part, further, the part utilizing described holding pad with the press pressure of more than 0.1MPa to be configured as described longitudinal wall and described export-oriented flange being used in described metal blank is pressurizeed to described die pressing to this part.

9. the manufacture method of bending parts as claimed in any of claims 1 to 8, wherein,

Described metal blank is the preprocessing metallic plate described metal blank having been carried out to preprocessing.

10. the manufacture method of bending parts as claimed in any of claims 2 to 9, wherein,

Aft-loaded airfoil is carried out to the described bending parts taken out from described compression molding device.

11. 1 kinds of skeleton structure components, this skeleton structure component comprises main body, this main body is by two longitudinal walls, the top board of two export-oriented flanges and lengthwise is formed, wherein, these two longitudinal walls are connected with the both ends of this top board and extend to the direction roughly orthogonal with this top board, these two export-oriented flanges are connected with these two longitudinal walls respectively, this main body has the shape of cross section of hat-shaped, and, this main body has the described top board in part place of the length direction being included in described top board, described two longitudinal walls and described two export-oriented flanges are all the profile of the bend of bowing towards the short transverse of described longitudinal wall, this skeleton structure component forms the bodyshell of automobile, wherein,

Described main body is more than 440MPa with hot strength and the steel plate that thickness of slab is 1.0mm ~ 2.3mm is raw material, and be the compressing body of compressing one-tenth under cold state or tepid state, the thickness of slab of this bend is less than 15% relative to the reduction rate of the thickness of slab of the remainder except described bend.